Exercise training device



FIG. 1 is a front right perspective view of an exercise training device, showing the new design thereof;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a top plan view.

Portions shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for an exercise training device, as shown and described. 